<template>
	<view>
		<view class="status" :style="{position:headerPosition,top:statusTop}"></view>
		<view class="header" :style="{position:headerPosition,top:headerTop}">
			<view class="title">购物车</view>
		</view>
		<!-- 占位 -->
		<view class="place"></view>
		<!-- 商品列表 -->
		<view class="goods-list">
			<view class="tis" v-if="goodsList.length==0">购物车是空的哦~</view>
			<view class="row" v-for="(row,index) in goodsList" :key="index">
				<!-- 删除按钮 -->
				<view class="menu" @tap.stop="deleteGoods(row.id)">
					<uni-icons type="trash" size="35" color="#fff"></uni-icons>
				</view>
				<!-- 商品 -->
				<view class="carrier" :class="[theIndex==index?'open':oldIndex==index?'close':'']"
					@touchstart="touchStart(index,$event)" @touchmove="touchMove(index,$event)"
					@touchend="touchEnd(index,$event)">
					<!-- checkbox -->
					<view class="checkbox-box" @tap="selected(index)">
						<view class="checkbox">
							<view :class="[row.selected?'on':'']"><text>✔</text></view>
						</view>
					</view>
					<!-- 商品信息 -->
					<view class="goods-info" @tap="toGoods(row)">
						<view class="img support_box">
							<image :src="row.goods.cover_path"></image>
							<text class="support_label" v-if="row.goods.mode.value == 2">配套</text>
						</view>
						<view class="info">
							<view class="title">{{row.goods.name}}</view>
							<view class="spec">{{row.goods.sketch}}</view>
							<view class="price-number">
								<view class="price">￥{{row.goods.price}}</view>
								<view class="number">
									<view class="sub" @tap.stop="sub(index)">
										<view class="icon jian"></view>
									</view>
									<view class="input" @tap.stop="discard">
										<input type="number" v-model="row.num" />
									</view>
									<view class="add" @tap.stop="add(index)">
										<view class="icon jia"></view>
									</view>
								</view>
							</view>
						</view>
					</view>
				</view>
			</view>
		</view>
		<!-- 脚部菜单 -->
		<view class="footer" :style="{bottom:footerbottom}">
			<view class="checkbox-box" @tap="allSelect">
				<view class="checkbox">
					<view :class="[isAllselected?'on':'']"><text>✔</text></view>
				</view>
				<view class="text">全选</view>
			</view>
			<view class="delBtn" @tap="deleteList()" v-if="selectedList.length>0">删除</view>
			<view class="settlement">
				<view class="sum">合计:<view class="money">￥{{sumPrice}}</view>
				</view>
				<view class="btn" @tap="toConfirmation">结算({{selectedList.length}})</view>
			</view>
		</view>
	</view>
</template>

<script>
	import {
		getCart,
		delCart,
		updateCart
	} from "@/api/shop.js"
	import {
		setGoodsData
	} from "@/utils/auth.js"
	export default {
		data() {
			return {
				sumPrice: '0.00',
				headerPosition: "fixed",
				headerTop: null,
				statusTop: null,
				showHeader: true,
				selectedList: [],
				isAllselected: false,
				goodsList: [],
				//控制滑动效果
				theIndex: null,
				oldIndex: null,
				isStop: false
			}
		},
		onPageScroll(e) {
			//兼容iOS端下拉时顶部漂移
			this.headerPosition = e.scrollTop >= 0 ? "fixed" : "absolute";
			this.headerTop = e.scrollTop >= 0 ? null : 0;
			this.statusTop = e.scrollTop >= 0 ? null : -this.statusHeight + 'px';
		},
		onLoad() {
			//兼容H5下结算条位置
			// #ifdef H5
			this.footerbottom = document.getElementsByTagName('uni-tabbar')[0].offsetHeight + 'px';
			// #endif
			// #ifdef APP-PLUS
			this.showHeader = false;
			this.statusHeight = plus.navigator.getStatusbarHeight();
			// #endif
		},
		onShow() {
			this.selectedList = []
			this.isAllselected = false
			this.theIndex = null
			this.oldIndex = null
			this.UserCart()
		},
		methods: {
			UserCart() {
				getCart().then(res => {
					this.goodsList = res.data
				})
			},
			//控制左滑删除效果-begin
			touchStart(index, event) {
				//多点触控不触发
				if (event.touches.length > 1) {
					this.isStop = true;
					return;
				}
				this.oldIndex = this.theIndex;
				this.theIndex = null;
				//初始坐标
				this.initXY = [event.touches[0].pageX, event.touches[0].pageY];
			},
			touchMove(index, event) {
				//多点触控不触发
				if (event.touches.length > 1) {
					this.isStop = true;
					return;
				}
				let moveX = event.touches[0].pageX - this.initXY[0];
				let moveY = event.touches[0].pageY - this.initXY[1];

				if (this.isStop || Math.abs(moveX) < 5) {
					return;
				}
				if (Math.abs(moveY) > Math.abs(moveX)) {
					// 竖向滑动-不触发左滑效果
					this.isStop = true;
					return;
				}

				if (moveX < 0) {
					this.theIndex = index;
					this.isStop = true;
				} else if (moveX > 0) {
					if (this.theIndex != null && this.oldIndex == this.theIndex) {
						this.oldIndex = index;
						this.theIndex = null;
						this.isStop = true;
						setTimeout(() => {
							this.oldIndex = null;
						}, 150)
					}
				}
			},
			touchEnd(index, $event) {
				//结束禁止触发效果
				this.isStop = false;
			},
			//控制左滑删除效果-end


			//商品跳转
			toGoods(e) {
				uni.navigateTo({
					url: '../../goods/goods1?id=' + e.goods_id
				});
			},
			//跳转确认订单页面
			toConfirmation() {
				if (this.selectedList.length == 0) {
					return uni.$showMsg('请选择商品')
				}
				uni.navigateTo({
					url: `/pages/orderfound/index?cart_ids=${this.selectedList.join('-')}`
				})
			},
			//删除商品
			deleteGoods(id) {
				let idList = [id]
				var that = this
				delCart({
					cart_ids: idList
				}).then(res => {
					if (res.code == 0) {
						let len = that.goodsList.length;
						for (let i = 0; i < len; i++) {
							if (id == that.goodsList[i].id) {
								that.goodsList.splice(i, 1);
								break;
							}
						}
						that.selectedList.splice(that.selectedList.indexOf(id), 1);
						that.sum();
						that.oldIndex = null;
						that.theIndex = null;
						if (that.selectedList.length == 0) {
							that.isAllselected = false
						}
					} else {
						uni.showToast({
							title: res.msg,
							icon: "none"
						})
					}
				})
			},
			// 删除商品s
			deleteList(e) {
				let len = this.selectedList.length;
				var that = this
				if (len > 0) {
					delCart({
						cart_ids: this.selectedList
					}).then(res => {
						if (res.code == 0) {
							let glist = that.goodsList
							let slist = that.selectedList
							let len = that.goodsList.length;
							glist.forEach((goods, goodsindex) => {
								slist.forEach(item => {
									if (item == glist[goodsindex].id) {
										glist.splice(goodsindex, 1);
									}
								})
							})
							that.$nextTick(() => {
								that.selectedList = [];
								that.goodsList = glist;
							})
							that.isAllselected = that.selectedList.length == that.goodsList.length && that
								.goodsList.length > 0;
							that.sum();
							that.oldIndex = null;
							that.theIndex = null;
						} else {
							uni.showToast({
								title: res.msg,
								icon: "none"
							})
						}
					})
				}

			},
			// 选中商品
			selected(index) {
				this.goodsList[index].selected = this.goodsList[index].selected ? false : true;
				let i = this.selectedList.indexOf(this.goodsList[index].id);
				i > -1 ? this.selectedList.splice(i, 1) : this.selectedList.push(this.goodsList[index].id);
				this.isAllselected = this.selectedList.length == this.goodsList.length;
				this.sum();
			},
			//全选
			allSelect() {
				let len = this.goodsList.length;
				let arr = [];
				for (let i = 0; i < len; i++) {
					this.goodsList[i].selected = this.isAllselected ? false : true;
					arr.push(this.goodsList[i].id);
				}
				this.selectedList = this.isAllselected ? [] : arr;
				this.isAllselected = this.isAllselected || this.goodsList.length == 0 ? false : true;
				this.sum();
			},
			// 减少数量
			sub(index) {
				if (this.goodsList[index].num <= 1) {
					return;
				}
				this.goodsList[index].num--;
				this.sum();
				this.UpdateCart(this.goodsList[index])
			},
			UpdateCart(e) {
				updateCart({
					cart_id: e.id,
					num: e.num
				}).then(res => {

				})
			},
			// 增加数量
			add(index) {
				this.goodsList[index].num++;
				this.sum();
				this.UpdateCart(this.goodsList[index])
			},
			// 合计
			sum(e, index) {
				this.sumPrice = 0;
				let len = this.goodsList.length;
				for (let i = 0; i < len; i++) {
					if (this.goodsList[i].selected) {
						if (e && i == index) {
							this.sumPrice = this.sumPrice + (e.detail.value * this.goodsList[i].price);
						} else {
							this.sumPrice = this.sumPrice + (this.goodsList[i].num * this.goodsList[i].goods.price);
						}
					}
				}
				this.sumPrice = this.sumPrice.toFixed(2);
			},
			discard() {
				//丢弃
			}


		}
	}
</script>
<style lang="scss">
	page {
		position: relative;
	}

	.checkbox-box {
		display: flex;
		align-items: center;

		.checkbox {
			width: 16px;
			height: 16px;
			border-radius: 100%;
			border: solid 2upx #D83428;
			display: flex;
			justify-content: center;
			align-items: center;
			color: #fff;

			text {
				display: none;
			}

			.on {
				width: 16px;
				height: 16px;
				text-align: center;
				font-size: 12px;
				line-height: 16px;
				border-radius: 100%;
				background-color: #D83428;

				text {
					display: block;
				}
			}
		}

		.text {
			font-size: 14px;
			margin-left: 10upx;
		}
	}

	.status {
		width: 100%;
		height: 0;
		position: fixed;
		z-index: 10;
		background-color: #fff;
		top: 0;
		/*  #ifdef  APP-PLUS  */
		height: var(--status-bar-height); //覆盖样式
		/*  #endif  */
	}

	.header {
		width: 92%;
		padding: 0 4%;
		height: 44px;
		display: flex;
		align-items: center;
		position: fixed;
		top: 0;
		z-index: 10;
		background-color: #fff;
		/*  #ifdef  APP-PLUS  */
		top: var(--status-bar-height);

		/*  #endif  */
		.title {
			font-size: 18px;
		}

	}

	.place {
		/* #ifndef H5 */
		height: 50px;
		/* #endif */
		/*  #ifdef  APP-PLUS  */
		margin-top: var(--status-bar-height);
		/*  #endif  */
	}

	.goods-list {
		width: 100%;
		padding: 20upx 0 120upx 0;

		.tis {
			width: 100%;
			height: 60upx;
			display: flex;
			justify-content: center;
			align-items: center;
			font-size: 32upx;
		}

		.row {
			width: calc(92%);
			height: calc(22vw + 40upx);
			max-height: 110px;
			margin: 20upx auto;

			border-radius: 15upx;
			box-shadow: 0upx 5upx 20upx rgba(0, 0, 0, 0.1);
			display: flex;
			align-items: center;
			position: relative;
			overflow: hidden;
			z-index: 4;
			border: 0;

			.menu {
				.icon {
					color: #fff;
					// font-size: 25upx;
					display: flex;
					align-items: center;
					justify-content: center;
					font-size: 16px;
				}

				position: absolute;
				width: 30%;
				height: 100%;
				right: 0;
				display: flex;
				justify-content: center;
				align-items: center;
				background-color: red;
				color: #fff;
				z-index: 2;
			}

			.carrier {
				@keyframes showMenu {
					0% {
						transform: translateX(0);
					}

					100% {
						transform: translateX(-30%);
					}
				}

				@keyframes closeMenu {
					0% {
						transform: translateX(-30%);
					}

					100% {
						transform: translateX(0);
					}
				}

				&.open {
					animation: showMenu 0.25s linear both;
				}

				&.close {
					animation: closeMenu 0.15s linear both;
				}

				background-color: #fff;

				.checkbox-box {
					padding-left: 20upx;
					flex-shrink: 0;
					height: 22vw;
					margin-right: 20upx;
				}

				position: absolute;
				width: 100%;
				padding: 0 0;
				height: 100%;
				z-index: 3;
				display: flex;
				align-items: center;

				.goods-info {
					width: 100%;
					display: flex;
					padding-right: 20upx;

					.img {
						width: 22vw;
						height: 22vw;
						border-radius: 10upx;
						overflow: hidden;
						flex-shrink: 0;
						margin-right: 10upx;
						max-width: 100px;
						max-height: 100px;

						image {
							width: 100%;
							height: 100%;
						}
					}

					.info {
						width: 100%;
						height: 22vw;
						max-height: 100px;
						display: flex;
						flex-wrap: wrap;
						position: relative;
						padding: 0 5px;
						box-sizing: border-box;

						.title {
							width: 100%;
							font-size: 28upx;
							display: -webkit-box;
							-webkit-box-orient: vertical;
							-webkit-line-clamp: 2;
							// text-align: justify;
							overflow: hidden;
						}

						.spec {
							font-size: 20upx;
							color: #a7a7a7;
							height: 36px;
							line-height: 18px;
							display: flex;
							align-items: center;
							border-radius: 15upx;
							letter-spacing: 1px;
							display: -webkit-box;
							-webkit-line-clamp: 2;
							-webkit-box-orient: vertical;
							overflow: hidden;
							margin-top: 5px;
						}

						.price-number {
							width: 100%;
							bottom: 0upx;
							display: flex;
							justify-content: space-between;
							align-items: center;
							font-size: 28upx;

							.number {
								display: flex;
								justify-content: center;
								align-items: center;

								.input {
									width: 60upx;
									height: 45upx;
									margin: 0 10upx;

									input {
										width: 60upx;
										height: 45upx;
										display: flex;
										justify-content: center;
										align-items: center;
										text-align: center;
										font-size: 26upx;
									}
								}


								.sub,
								.add {
									width: 18px;
									height: 18px;
									line-height: 18px;
									border-radius: 50%;
									border: 1px solid #D83428;
									display: flex;
									align-items: center;
									justify-content: center;

									.icon {
										color: #D83428;
										font-size: 14px;
									}
								}

								.add {
									background: #D83428;

									.icon {
										color: #fff;
									}
								}
							}
						}
					}
				}
			}
		}
	}

	.footer {
		width: 100%;
		max-width: 500px;
		box-sizing: border-box;
		padding: 0 4%;
		background-color: #fbfbfb;
		height: 100upx;
		display: flex;
		justify-content: space-between;
		align-items: center;
		font-size: 14px;
		position: fixed;
		bottom: 0upx;
		z-index: 5;

		.delBtn {
			border: solid 1upx #D83428;
			color: #D83428;
			padding: 0 25upx;
			height: 25px;
			border-radius: 30upx;
			display: flex;
			justify-content: center;
			align-items: center;
		}

		.settlement {
			width: 65%;
			display: flex;
			justify-content: flex-end;
			align-items: center;

			.sum {
				width: 50%;
				font-size: 14px;
				margin-right: 10upx;
				display: flex;
				justify-content: flex-end;

				.money {
					font-weight: 600;
				}
			}

			.btn {
				padding: 0px;
				width: 45%;
				height: 35px;
				background-color: #D83428;
				color: #fff;
				display: flex;
				justify-content: center;
				align-items: center;
				border-radius: 20px;
			}
		}
	}
</style>